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Terminal parallelly-connected resistor device for preventing impedance mismatch in security and protection system

A technology of impedance mismatch and security system, applied in the direction of sequence/logic controller program control, cable transmission adaptation, electrical program control, etc.

Inactive Publication Date: 2013-03-27
XIAN XINGYUN NETWORK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far there is no convenient way to deal with the failure phenomenon caused by this impedance mismatch

Method used

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  • Terminal parallelly-connected resistor device for preventing impedance mismatch in security and protection system

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Embodiment Construction

[0008] The present invention will be further described below via accompanying drawing:

[0009] as attached figure 1 As shown in the figure, in the security system to prevent impedance mismatched terminals from being connected in parallel with resistance devices, an embedded ARM embedded chip 1 with an impedance mismatched line driver chip 2 is installed, and an impedance mismatched line is attached with a terminal and parallel connection resistor 3 is the same as the embedded The ARM embedded chip 1 controls conduction, and the embedded ARM embedded chip 1 is also equipped with an impedance mismatch line signal filter 4, and a terminal is attached to the impedance mismatch line and connected to the edge of the resistor 3 to conduct the signal filter 5.

[0010] By attaching a terminal to the impedance-mismatched line and connecting the edge of the resistor 3 to conduct the signal filter 5, and the embedded ARM embedded chip 1 also attaches an impedance-mismatched line signal ...

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Abstract

A terminal parallelly-connected resistor device for preventing impedance mismatch in a security and protection system is characterized in that a continuity signal filter is arranged at the edge of a terminal parallelly-connected resistor attached to an impedance mismatch line, and an impedance mismatch line signal filter is further attached to an embedded ARM (advanced reduced instruction set computer machine) control chip. Therefore, the fault of interference of a plurality of vertical bars at equal intervals generated on a monitor screen caused by impedance mismatch can be processed conveniently.

Description

technical field [0001] The invention relates to the field of security technology, in particular to a terminal parallel connection resistance device for preventing impedance mismatch in a security system. Background technique [0002] In the current security system, the fault phenomenon is caused by the mismatch of the characteristic impedance of the transmission line. The manifestation of this phenomenon is that a number of vertical stripes with equal spacing are generated on the monitor screen, and the frequency of the interference signal is basically an integer multiple of the line frequency. This is caused by an impedance mismatch due to a mismatch in the characteristic impedance of the video transmission line. It can also be said that this interference phenomenon is caused by the fact that the characteristic impedance of the video cable and the distribution parameters do not meet the requirements. So far there is no convenient way to deal with the failure phenomenon ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/10G05B19/05
Inventor 吴新潮
Owner XIAN XINGYUN NETWORK